Not a problem, I'll put up here how I get on, I've also up sized my tyres to a 45 profile from 40, I usually use uniroyals or hankooks, the uniroyals are a very good tyre for there price, brilliant wet grip esp with the RS3's, until my tyres turned up I wasn't sure whether the spare would fit in the well, I'm glad to say it does
there isn't any room for error and hopefully once the tyre is mounted on a rim it will still fit haha!